List of common virus terms encountered during computer use

Boot sector

The hard drive, the floppy drive, and the logical drive (after partitioning) all have boot sector information stored. Refer to Partition table, Master Boot record, and Multi-partite virus.

Boot sector or MBR virus

A virus that can affect a fixed boot sector or floppy drive. Any formatted hard disk (even if it is empty, or contains only some data) can be infected with a boot sector. When an attempt is made to boot a system from a poisoned floppy disk or hard disk, the boot-type virus is activated and resides in memory. The type of this virus will replicate itself to the Master boot record (MBR) or to the boot sector of the hard disk. Every time you reboot the system, it will activate the virus in memory. This is some of the most common viruses. When an in-memory virus tries to eliminate it when it is active it is not going to work because it will copy itself to the hard drive before you clear it out of memory. Plus most are stealth viruses. To be safe, you should use a clean floppy disk with write protection to cool off the computer, and then try to clear the infected boot-type virus.

Circulatory infection

When two viruses infect a boot sector of a hard drive, the type of infection occurs, as this disk is not intended to be used as a boot system. Removal of a virus typically causes and other viruses to infect again. See also Boot sector or MBR Virus.

Cmos

Complementary metal oxide Semiconductor complimentary Metal oxide semi-conductor. In the CMOS, the interface structure information is stored, and some viruses try to change the data.

Accompanying virus

A virus that infects executables by creating a "partner" file with the same filename, but. Except for COM extensions. Because of the DOS executable file, (. COM,. Exe. BAT) to load the virus before execution.

cross-linked file

Cross-linking is a rare virus-carrying phenomenon that occurs when two files use a common magnetic recording cluster on a hard disk.

Dropper

A program that can release a virus includes a virus that is compressed and carries Pklite, Diet, Lzexe, and so on. It has a plan to release the virus to the hard drive, the floppy drive, a file or memory.

Encryption

In a difficult to find encrypted virus, the encrypted virus uses an encryption process at the beginning of the program to decrypt the program and then run it. This means that the virus scanner relies on some byte of the signature file to look for it. The probability of success of the virus will be greatly reduced. This encrypted password is changed every time, please see polymorphic virus.

Executable Code

behaves as "executable code" on the computer. This includes Com,exe,dll and a number of similar documents. Broadly speaking, executable code includes some commonly used applications, such as disk boot sector, batch files, and macros.

False Positive

A false-positives behavior when the scanner reports a virus-free file to an infected one.